<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        /* 自调函数 */
        /* (()=>{
            console.log("hello world");
        })() */
        
        (async function(){
            console.log("function");
        })()
    </script>
</body>
</html>